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Dear all,<br>
<br>
SORRY ABOUT THE LAST MESSAGE! Hit send before I meant to! <br>
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Thank you for maintaining this wonderful software and this user
mailing list!<br>
<br>
I am attempting to use an additive Schwartz preconditioner with
multiple blocks per processor. I've been able to get it to work
with one block per processor but not been successful with
multiple. I believe I am not understanding correctly the
construction of index sets for this case.<br>
<br>
Let's consider a simple example: 16 nodes on a square with 4
blocks of 4x4:<br>
<br>
<img alt="Image" src="cid:part1.02050800.00040000@nasa.gov"
height="272" width="272"><br>
<br>
<br>
I want to put <img style="vertical-align: middle"
src="cid:part2.08070302.06050002@nasa.gov" alt="$\Omega_1$"> and
<img style="vertical-align: middle"
src="cid:part3.03000506.05030706@nasa.gov" alt="$\Omega_2$"> on
processor 1 and the other two on the second processor. Do I make
my index sets on processor 1 <br>
<br>
IS = { {1,2,3,5,6,7,9,10,11}, {2,3,4,6,7,8,10,11,12} }<br>
IS_LOCAL = { {1,2,5,6}, {3,4,7,8} }<br>
<br>
and similarly for the other processor? I tried this and it isn't
quite working out. Do I misunderstand something?<br>
<br>
Thank you!<br>
<br>
Best regards,<br>
Justin<br>
<br>
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---------------------------------------------<br>
Justin Droba, PhD<br>
Applied Aeroscience and CFD Branch (EG3)<br>
NASA Lyndon B. Johnson Space Center<br>
JETS/Jacobs Technology, Inc. and HX5, LLC<br>
<br>
<b>Office:</b> Building 16, Room 142<br>
<b>Phone</b>: 281-483-1451<br>
---------------------------------------------<br>
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